With 1.30 I've seen a lot of very bad AI plays with purify. I've seen it play it on creatures that didn't have any damage or poison, and have seen it play it on my own creatures. I've also seen it fire lance itself when it had shard of sacrifice active, which while it makes sense in some cases, makes zero sense when it could have saved them up to kill me with instead. Another interesting thing I've seen is that Shard of Focus has an extremely high fractal target priority, and this actually screws up some decks. I've seen Decay and Eternal Phoenix ruin their own strategy by not fractaling their pests and phoenixes, and just spamming shards of focus over and over. Perhaps the AI should preferentially target its own creatures with fractal? (and nightmare, for that matter; i've had games where the AI kindly handed me a half dozen lava destroyers or werewolves or something)
On the plus side, the AI will actually play shard of patience now; before, it never put it down unless it had something like 6-7+ creatures or you had sundial/sosa active. It also seems to be a little better at using abilities when it has quanta, rather than doing things like passing the turn when it has 2-3 gravity quanta and a pulverizer out, and you have a permanent it should be targeting. It will also target you with purify to remove the sacrifice effect.